Je was op zoek naar: glottalization (Engels - Vietnamees)

syllables without glottalized codas developed the opposite tone—for example, high tone in navajo and low tone in slavey, due to contrast with the tone triggered by the glottalization.
syllables without glottalized codas developed the opposite tone—for example, high tone in navajo and low tone in slavey, due to contrast with the tone triggered by the glottalization.

when final consonants are lost, a glottal stop tends to leave a preceding vowel with a high or rising tone (although glottalized vowels tend to be low tone, so if the glottal stop causes vowel glottalization, that will tend to leave behind a low vowel), whereas a final fricative tends to leave a preceding vowel with a low or falling tone.
when final consonants are lost, a glottal stop tends to leave a preceding vowel with a high or rising tone (although glottalized vowels tend to be low tone, so if the glottal stop causes vowel glottalization, that will tend to leave behind a low vowel), whereas a final fricative tends to leave a preceding vowel with a low or falling tone.